#来自在线整数序列百科全书的问候!搜索:id:a0554426 展示1-1的1个1 ;%I a0554426;%S a0554426 1,2,3,3,4,4,7,8,5,5,6,13,19,14,15,20,20,16,9,10,23,34,29,35,50,43,43,24,25,44,53,;%T a054426 38,30,30,39,26,26,11,12,33,33,59,48,66,97,84,49,60108132,132,98,98,109,109,109,109,109,109,109,109,109,109,109,109,19,23,34,29,35,35,50,43,24,24,75,36,37, %U a054426 76112,89,99135113,61,54,91100,69,55,62,40,17,18,47,82,73105,154 %N A054426到A054424的逆置换。 %H A054426自然数排列序列的索引项%F A054426 a(j)=第n个成员(j,A054424) %p A054426第n个成员:=proc(e,l,'k');如果(成员(e,l,'k'))则返回(k),否则返回(0);fi;end; %t A054426 a[n_u]:=如果[p=位置[A054424,n];p!={},p[[1,1]];0];(*∗u-François Alcover %K A054426 nonn %O A054426 1,2 %A A054426 Antti Karttunen #内容可根据OEIS最终用户许可协议获得:http://OEIS.org/License